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R E L I N E S

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“I sent a reline to the lab and the bite is now open half an inch in the anterior, what happened?”
By  Larry R. Holt, DDS, FICD
Things can easily be messed up during a reline process.  But, if you take a little extra time and follow a protocol, you can easily get nice results too.
First, is the denture worth relining?  Really old dentures are typically worn and the acrylic is not amenable to accepting new acrylic.  
Its ok to tell a patient that their denture is ready for the scrap heap!
First (a second time) its very difficult to make major corrections on tooth position by performing a reline.  It happens accidentally on occasion, but when attempting to do something like intentional lengthening for more tooth reveal, its very difficult to be predictable.  This is a procedure to refit the intaglio surface, not to realign the teeth.
Remember, all relines are closed bite impressions.  If you take the reline impression open mouth, it is almost impossible to maintain proper occlusion.  Eve…

OBTU, SAY WHAT?

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OBTU, SAY WHAT?

Before working in the dental lab, I had never given much thought to a palatal obturator.  Before working with Dr. Amit Paryag, I had never seen a restorative dentist with such fire and keenness toward patient and product perfection - "patient centered care", as he refers to it.  When the two rolled in to one for us at Drake, something momentous was born. 



DID YOU KNOW? In 1560 Lusitanus was probably the first to describe what is today known as palatal obturator used for permanent luetic fistula of the palate (). In 1564 Ambroise Parè called his small obturators “couvercles”, and in 1575 changed the name to “obturateur" which is derived from the Latin “obturo” meaning to stop upIn 1634, Johson translated Parè’s “surgery”, published for king Henri the third. The text described an appliance to restore the palatal defect caused by venereal diseases and gunshot wounds. In order to create his obturators, Parè filled the cavities with a gold or silver plate a lit…

WHY MY DENTURES (DON'T) SUCK - PART 4

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Patients With Terminal Dentitions  .........................How to Avoid Extracting Teeth Before Immediate Denture Fabrication


So, you have a patient in the chair whose teeth move around like a piano player.  Its always a miracle some of the teeth don’t fall out when they sneeze.  Your plan is to take an alginate impression to send to the lab for fabrication of immediate denture.  Only problem is, there is no assurance that some of the teeth wont come out in the impression.  First and foremost, it is not your fault that the patient has waited to seek treatment.  Be sure you explain that you will make every effort not to perform unintended oral surgery.  That said, sometimes even with best efforts, these teeth will come out during the impression.  Please follow on to see how I have been dealing with these cases.
You will need: A good stock tray. (I like the COE Spacer trays) PVS adhesive Alginate Adhesive Fast Set, Heavy Body PVS impression material Fast Set Bite Registration material Alginate

I…

Wet milling in all it's glory!

WET MILLING e.Max


To go with our video clip, here is a neat little article from IDT  about milling machines.  It explains a few basic workings and some comparative details - including wet versus dry.

At Drake, we do both - different options for different configurations, different materials, and different outcomes. 

If you want to know more, give us a call!
You can never be armed with too much knowledge.

HOW GOOD ARE YOUR EYES?

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I know this post isn't DENTAL, sorry!

But I got this as an email forward (which I usually delete immediately) & it was too cool not to share!

Also, as a detail oriented person, I was shocked that I've seen ALL of these logos before and have never picked up on any of their intended details - except for the last one. So again, I had to share.
I was 1 for 8.  
How do you fare?













WHY MY DENTURES (DON'T) SUCK - PART 3

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Part 3: Precision Denture Processing

Remember those dental material science classes?  In my day, Duane Taylor described polymerization shrinkage - its that pesky process by which our materials shrink dimensionally during their setting reactions.  This shrinkage impacts daily restorative procedures such as composite placement.  We have all developed techniques to allow for this by using some sort of layering techniques when filling teeth.
Polymerization shrinkage is particularly vexing during denture processing.  As dentures are processed, this shrinkage typically “draws” the intaglio away from the palate and additionally can pull teeth lingually.  This directly affects tissue adaptation and denture occlusion
 The amount of distortion varies depending on many factors: -  brand and quality of denture acrylic -
-  proper mixing of acrylic per manufacturer’s instructions -
- proper work flow including processing flasks, boil out tanks, etc -
- skill and experience of technician -

In a worst cas…

THE ROBOT IN THE WORKFORCE

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After giving a lab tour to a couple of dental students the other day, I caught myself drifting off on the familiar topic of  MAN vs MACHINE...
When you see all the shiny moving parts of the scanners, millers and printers, you can't help but to ask the same question as most - "how many people's jobs have these replaced?"



And let me tell you how satisfying it is to say NONEevery time!  If you read one of our previous blogs on digital, we touched on this topic a bit - that technology isn't magic and still needs brainpower to operate it. And that we take pride in not getting rid of old techniques and skills, but up-cycling them into other areas where they can be honed and refined. The same goes for technicians - hand waxers can become CAD/CAM designers with a stylus in hand.

As I drifted further, I became curious about other professions and how they may have changed over time. Check out this article I found and how there was a time when taxi drivers thought their j…